"Subsection (2) applies where a person is convicted of an offence which is punishable with a custodial sentence... (2) The court must not pass a custodial sentence unless it is of the opinion that— (a)the offence, or (b)the combination of the offence and one or more offences associated with it was so serious that neither a fine alone nor a community sentence can be justified for the offence... (6) In forming its opinion for the purposes of subsection (2), the court must take into account all the information that is available to it about the circumstances of the offence, or of it and the associated or offence or offences, including any aggravating or mitigating factors."